What's is the variable cost

This Question: 2 pts 1 of 25 (0 complete) This Test: 100 pts possible Kim Airedale, a manager of Waggers, Inc., was reviewing the water bills of a dog daycare and spa. She determined that its highest and lowest bills of $3,600 and $2,200 were incurred in the months of May and November, respectively. If 400 dogs were washed in May and 100 dogs were washed in November, what was the variable cost per dog associated with the company's water bill? (Round your answer to the nearest cent.) O A. $4.67 O B. $4.40 O C. $9.00 hs O D. $22.00 ? Click to select your answer. DUE AT 11:59 PM Score: - Chapter 7 Dynamic Study Module for extra credit